Search found 30 matches

by Kilh
Mon Mar 30, 2015 2:21 pm
Forum: Software Forum
Topic: Need help with Marlin setup - MIN/MAX confusion and home pos
Replies: 12
Views: 19925

Re: Need help with Marlin setup - MIN/MAX confusion and home

The realtive positioning, right! I just realized that 30 seconds ago, thanks a ton! Seems like you fixed alomst all of my headaches within minutes, I owe you one :) I had to add "M400" to the code after the move command to prevent it from projecting while it was still on the way, but for n...
by Kilh
Mon Mar 30, 2015 1:47 pm
Forum: Software Forum
Topic: Need help with Marlin setup - MIN/MAX confusion and home pos
Replies: 12
Views: 19925

Re: Need help with Marlin setup - MIN/MAX confusion and home

So... I've put G28 Z (home Z to the top) and G1 Z0.01 (move to pos 0.01) in the start Gcode, but CW seems to ignore the G1 Z0.01 command. When I use the manual Gcode in CW it only seems to work 10% of the time. The command works 100% of the time in Pronterface. I checked the positions via M114 and i...
by Kilh
Mon Mar 30, 2015 12:59 pm
Forum: Software Forum
Topic: Need help with Marlin setup - MIN/MAX confusion and home pos
Replies: 12
Views: 19925

Re: Need help with Marlin setup - MIN/MAX confusion and home

Ah I see, thanks for clearing that up. So just to confirm what you're suggesting: Plug in the motor to basically spin in the wrong direction (Green/Black/Red/Blue instead of Red/Blue/Green/Black) and invert the axis movement to compensate for that and to trick the firmware into thinking up is down a...
by Kilh
Mon Mar 30, 2015 12:53 pm
Forum: Software Forum
Topic: Need help with Marlin setup - MIN/MAX confusion and home pos
Replies: 12
Views: 19925

Re: Need help with Marlin setup - MIN/MAX confusion and home

Maybe I should put the basic question this way: When I hit the "Home" button, do I want the platform to move to the first layer (in the VAT) or to the topmost position (at least in my logic that sounds right). The motor moves just as it should, I can't see what should be wrong with the wir...
by Kilh
Mon Mar 30, 2015 12:03 pm
Forum: Software Forum
Topic: Need help with Marlin setup - MIN/MAX confusion and home pos
Replies: 12
Views: 19925

Re: Need help with Marlin setup - MIN/MAX confusion and home

The way it's working right now is that I can hit the home button and it will move upwards until it reaches the MAX endstop I put there. After that I can move it down 111mm (just a value for testing reasons) where the software endstop kicks in. That looks absolutely right to me, but when I try to pri...
by Kilh
Mon Mar 30, 2015 10:54 am
Forum: Software Forum
Topic: Need help with Marlin setup - MIN/MAX confusion and home pos
Replies: 12
Views: 19925

Re: Need help with Marlin setup - MIN/MAX confusion and home

Should the MAX endstop be at the top or the bottom? I disabled one as I only wanted to use one hardware endstop and the software endstop for the bottom. I tried setting the Z_HOME_DIR to 1 (max), but that's basically what I described above; it would try to print from the home position upwards. Where...
by Kilh
Sun Mar 29, 2015 11:41 pm
Forum: Software Forum
Topic: Need help with Marlin setup - MIN/MAX confusion and home pos
Replies: 12
Views: 19925

Need help with Marlin setup - MIN/MAX confusion and home pos

Hey guys, I really wanted to solve this myself and spent almost two days trying to get everything to work, but now I'm finally devastated, trying to find the problem. I'm using a Mega 2560 with RAMPS 1.4. Bottom-up build, one endstop. Here's a picture for reference (the endstop is marked with yellow...
by Kilh
Thu Mar 19, 2015 6:12 am
Forum: Electronics
Topic: Understanding Microstepping
Replies: 9
Views: 9221

Re: Understanding Microstepping

Thanks for clearing that up :) I guess I was just overthinking the issue and made myself crazy about it.

Now back to finalizing the construction and figuring out how to make the shutter servo work :D
by Kilh
Wed Mar 18, 2015 8:28 pm
Forum: Electronics
Topic: Understanding Microstepping
Replies: 9
Views: 9221

Re: Understanding Microstepping

Alright, that's what my logic told me as well, 3.125 or 3200 steps. So the question is... why does it even work correctly? In the Marlin config I set it to 320 steps/mm (as suggested by the online tool) and when I move the axis via CW it moves exactly as it should. Do I have to add the microstepping...
by Kilh
Wed Mar 18, 2015 9:16 am
Forum: Electronics
Topic: Understanding Microstepping
Replies: 9
Views: 9221

Understanding Microstepping

Hey Folks, I finally started with my build and while everything seems to come together as planned so far, I still kind of struggle with the electronics. I'm using an Arduino Mega with Ramps 1.4 and A4988 drivers. After some trial and error and a good amount of cursing I got my z-stage to work. When ...